Wristwatch



FIG. 1 is a front view of my new, original and ornamental design for a wristwatch;

FIG. 2 is a rear view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a right front perspective view thereof; and,

FIG. 8 is a rear and right side perspective view thereof.

The broken lines in the drawings are used to show portions of the wristwatch that do not form part of the claimed design. 

The ornamental design for a wristwatch, as shown and described. 